#pragma once
#include<stdio.h>
#include<stdlib.h>
typedef char BTDATATYPE;
typedef struct BinaryTreeNode
{
	struct BinaryTreeNode* left;
	struct BinaryTreeNode* right;
	BTDATATYPE data;
}BTNode;


void PrevOrder(BTNode* root);
void mediumOrder(BTNode* root);
void BackOrder(BTNode* root);
int TreeSize(BTNode* root);
int TreeleafSize(BTNode* root);
void layerOrder(BTNode* root);